package threat;

public class SyncDemo3 {
    public static void main(String[] args) {
        Boo b1 = new Boo();
        Boo b2 = new Boo();
        Thread t1 = new Thread(() -> b1.doSome());
        Thread t2 = new Thread(() -> b2.doSome());
        t1.start();
        t2.start();

    }
}

class Boo {
    public synchronized static void doSome() {
        synchronized (Boo.class) {
            try {
                Thread t = Thread.currentThread();
                System.out.println(t.getName() + "开始执行doSome方法");
                Thread.sleep(5000);
                System.out.println(t.getName() + "执行doSome方法完毕");
            } catch (InterruptedException ignored) {
            }
        }
    }
}